Answer Posted / paul s

in uk properties that are fed by underground suppliers,
the earth is bonded to the neutral at the supply point, the
neutral coming from the star point of the transfomer is
also earthed hence the earth is at the same potential as the
neutral. the system is called protective multiple earthing,
so no earth rods are used.

If a high resistance fault occurs,then what are the changes will happen in the system?

1471

---

The power supplied to a 50mH inductor from a 120V, 60Hz source will be

4796

---

What is the exact formula for one weber of magnetic flux?

2140

---

what transformer we used normally and upto which kva?

1951

---

What is the armature mmf in a D.C machine?

1245

---

what is the purpose that we use PLC system in power system

5093

---

why starting current is high and resistance is almost 0 during the starting of motor dc motor...?

1736

---

What are dcs and plc?

1111

---

can anyone explain 11kV 3core cable megger,hi pot test procedure with connection details?

3278

---

is it true there's a big difference in using Cummins or Denyo...especially power output or leakage

1942

---

Readings of ER300P Trivector meter

6425

---

what is the meaning of 0.5ohm Resistance

1862

---

Has someone here done a sizing for a generator (3 phase), its for a pumping station. If you have an example for standby/duty and both running (I) star delta (ii) Soft Starter.

2144

---

How should i design a 1ph & 3 ph transformer. Kindly let meknow all steps and formulaes related to design from scratch.

1999

---

1. The DC generaror,s induced output emf is connected with a DC motor(as load). when increasing the load of the motor by using brake drum or any way. what are the parameters will changes in both motor and generator(voltage, current, resistance, frequency, speed, torque, power, flux etc...) 2. Similarly for AC generator and AC motor 3. similarly if using DC batteries instead of DC generator, What happens?

2303

---